Santiago is regarded as “Messenger-Angel of the Lord Jesus Christ” (Revelation 22:16), “Prophet of the Kingdom Age,” and spiritual successor to William Marrion Branham. Indeed, he is considered God’s final messenger. Though Santiago can be evasive on the matter, the group’s materials refer to him in terms normally reserved for Jesus himself.

In 2005, some Brazilian evangelicals were outraged to discover that Santiago had been given a platform at various Pentecostal churches, as well as prestigious gatherings of Christian leaders (such as the Ordem dos Ministros Evangélicos do Brasil), and presented with various honors.

Adherents use many organizational identities, and individual churches may not have a name that indicates their affiliation with Santiago.